Cavity-Enhanced Emission and Absorption of Color Centers in a Diamond Membrane With Selectable Strain
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909213382410240 |
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| author | Berghaus, Robert Sachero, Selene Bayer, Gregor Heupel, Julia Herzig, Tobias Feuchtmayr, Florian Meijer, Jan Popov, Cyril Kubanek, Alexander |
| author_facet | Berghaus, Robert Sachero, Selene Bayer, Gregor Heupel, Julia Herzig, Tobias Feuchtmayr, Florian Meijer, Jan Popov, Cyril Kubanek, Alexander |
| contents | Group IV color centers in diamond are among the most promising optically active spin systems with strong optical transitions and long spin coherences. The ground-state splitting of the center is particularly important to suppress the interaction with coherence-limiting phonons, which improves the coherence properties and sets the upper limit for the operating temperature. Negatively charged silicon-vacancy centers have an ordinary ground-state splitting of only 48GHz, resulting in required temperatures below one Kelvin, which can only be achieved by dilution refrigerators. Here, we increase the ground-state splitting by up to an order of magnitude by induced strain in a single-crystal diamond membrane. Furthermore, we demonstrate cavity-assisted spectroscopy enabled by coupling the emitter ensemble with a selectable strain to the mode of a Fabry-Perot microcavity. Calculation of the absorption cross-section yields $σ_{ens} = $4.9*10^-11 cm^2. Together with the Purcell-enhanced twofold reduction in emitter lifetime below 1ns, this makes the system a promising spin-photon interface at moderate temperatures of 4K. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_20205 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cavity-Enhanced Emission and Absorption of Color Centers in a Diamond Membrane With Selectable Strain Berghaus, Robert Sachero, Selene Bayer, Gregor Heupel, Julia Herzig, Tobias Feuchtmayr, Florian Meijer, Jan Popov, Cyril Kubanek, Alexander Quantum Physics Group IV color centers in diamond are among the most promising optically active spin systems with strong optical transitions and long spin coherences. The ground-state splitting of the center is particularly important to suppress the interaction with coherence-limiting phonons, which improves the coherence properties and sets the upper limit for the operating temperature. Negatively charged silicon-vacancy centers have an ordinary ground-state splitting of only 48GHz, resulting in required temperatures below one Kelvin, which can only be achieved by dilution refrigerators. Here, we increase the ground-state splitting by up to an order of magnitude by induced strain in a single-crystal diamond membrane. Furthermore, we demonstrate cavity-assisted spectroscopy enabled by coupling the emitter ensemble with a selectable strain to the mode of a Fabry-Perot microcavity. Calculation of the absorption cross-section yields $σ_{ens} = $4.9*10^-11 cm^2. Together with the Purcell-enhanced twofold reduction in emitter lifetime below 1ns, this makes the system a promising spin-photon interface at moderate temperatures of 4K. |
| title | Cavity-Enhanced Emission and Absorption of Color Centers in a Diamond Membrane With Selectable Strain |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2405.20205 |